#include "uart.h"
#include "delay.h"

uint ReceiveCount = 0;
uchar uart_timeout;

/**
  * @brief :串口初始化
  * @param :无
  * @note  :无
  * @retval:无
  */
void drv_uart_init( )
{
    //TX配置为输出 RX配置为输入
    UART_TX_PxM0 |= IO_OUT_PUT_PP_M0 << UART_TX_PIN_BIT;
    UART_TX_PxM1 |= IO_OUT_PUT_PP_M1 << UART_TX_PIN_BIT;
    UART_RX_PxM0 |= IO_IN_PUT_ONLY_M0 << UART_RX_PIN_BIT;
    UART_RX_PxM1 |= IO_IN_PUT_ONLY_M1 << UART_RX_PIN_BIT;
    UART_TX = 1;

    //串口配置
    SCON &= (uchar)((uchar)( ~( UART_MODE | UART_RX )));	//清SM0 SM1 REN
    SCON |= (uchar)( UART_8BAUDRATE_VOLATILE | UART_RX );

    //TIM1配置
    TMOD &= (uchar)((uchar)( ~TIM1_MODE ));
    TMOD |= TIM1_MODE_2;	//8位自动重装
    PCON = 0x00;
    TH1 = 0xFD;				//波特率默认配置为9600
    TL1 = 0xFD;

    TI = 1;					//清发送标志
    TR1 = 1;				//使能定时器
}

/**
  * @brief :串口发送数据
  * @param :
  *	@TxBuffer:发送数据首地址
  *	@Length:数据长度
  * @note  :无
  * @retval:无
  */
void drv_uart_tx_bytes(char* TxBuffer, uchar len)
{
    while(len--)
    {
        while( 0 == TI );		//等待上次发送完成
        TI = 0;					    //清标志位
        SBUF = *TxBuffer;		//发送数据
        TxBuffer++;
    }
}

/**
  * @brief :串口接收数据
  * @param :
  *	@RxBuffer:发送数据首地址
  * @note  :无
  * @retval:接收到的字节个数
  */

uchar drv_uart_rx_bytes()
{
    char temp = 0;
    ReceiveCount = 0;
    uart_timeout = 250;

    while(uart_timeout--) {
        if((0 != RI) && 0 == ReceiveCount) //读取第一个字符
        {
            RI = 0;
            temp = SBUF;
            if(temp != '#')
                Tx_Buf[ReceiveCount++] = temp;
            else
                return 0;
        }
        while(temp != '#' && ReceiveCount < 32 && uart_timeout--) //'#'为结束符号
        {
            if(0 != RI)				//检测是否接收到数据
            {
                RI = 0;					//清标志位
                temp = SBUF;
                Tx_Buf[ReceiveCount++] = temp;		//读数据
            }
            uart_timeout = 250;
        }
    }
    if(ReceiveCount <= 31)
        Tx_Buf[ReceiveCount++] = '\0';
    return ReceiveCount;
}